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Non-equilibrium dynamics of Axion-like particles: the quantum master equation
Shuyang Cao, Daniel Boyanovsky
We study the non-equilibrium dynamics of Axion-like particles (ALP) coupled to Standard Model degrees of freedom in thermal equilibrium. The Quantum Master Equation (QME) for the (…
Brownian Axion-like particles
Shuyang Cao, Daniel Boyanovsky
We study the non-equilibrium dynamics of a pseudoscalar axion-like particle (ALP) weakly coupled to degrees of freedom in thermal equilibrium by obtaining its reduced density matri…
Thermalization by off-shell processes: the virtues of small virtuality
Daniel Boyanovsky
We study the thermalization of a scalar field coupled to two other scalar fields that constitute a bath in thermal equilibrium. For a range of masses the propagat…
Threshold and infrared singularities: time evolution, asymptotic state and entanglement entropy
Daniel Boyanovsky
Threshold and infrared divergences are studied as possible mechanisms of particle production and compared to the usual decay process in a model quantum field theory from which gene…